[Intel-gfx] [RFC 23/60] drm/i915/dg1: map/unmap pll clocks
Matthew Auld
matthew.auld at intel.com
Fri Jul 10 11:57:20 UTC 2020
From: Lucas De Marchi <lucas.demarchi at intel.com>
DG1 uses 2 registers for the ddi clock mapping, with PHY A and B using
DPCLKA_CFGCR0 and PHY C and D using DPCLKA1_CFGCR0. Hide this behind a
single macro that chooses the correct register according to the phy
being accessed, use the correct bitfields for each pll/phy and implement
separate functions for DG1 since it doesn't share much with ICL/TGL
anymore.
The previous values were correct for PHY A and B since they were using
the same register as before and the bitfields were matching.
Cc: José Roberto de Souza <jose.souza at intel.com>
Cc: Clinton Taylor <Clinton.A.Taylor at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 92 +++++++++++++++++++-
drivers/gpu/drm/i915/display/intel_display.c | 25 +++++-
drivers/gpu/drm/i915/i915_reg.h | 15 ++++
3 files changed, 128 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 4a1a896098f9..b5ba02deb24b 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -2848,6 +2848,38 @@ static u32 icl_dpclka_cfgcr0_clk_off(struct drm_i915_private *dev_priv,
return 0;
}
+static void dg1_map_plls_to_ports(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ struct intel_shared_dpll *pll = crtc_state->shared_dpll;
+ enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
+ u32 val;
+
+ /*
+ * If we fail this, something went very wrong: first 2 PLLs should be
+ * used by first 2 phys and last 2 PLLs by last phys
+ */
+ if (WARN_ON((pll->info->id < DPLL_ID_DG1_DPLL2 && phy >= PHY_C) ||
+ (pll->info->id >= DPLL_ID_DG1_DPLL2 && phy < PHY_C)))
+ return;
+
+ mutex_lock(&dev_priv->dpll.lock);
+
+ val = intel_de_read(dev_priv, DG1_DPCLKA_CFGCR0(phy));
+ WARN_ON((val & DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)) == 0);
+
+ val &= ~DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
+ val |= DG1_DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, phy);
+ intel_de_write(dev_priv, DG1_DPCLKA_CFGCR0(phy), val);
+ intel_de_posting_read(dev_priv, DG1_DPCLKA_CFGCR0(phy));
+
+ val &= ~DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
+ intel_de_write(dev_priv, DG1_DPCLKA_CFGCR0(phy), val);
+
+ mutex_unlock(&dev_priv->dpll.lock);
+}
+
static void icl_map_plls_to_ports(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state)
{
@@ -2885,6 +2917,19 @@ static void icl_map_plls_to_ports(struct intel_encoder *encoder,
mutex_unlock(&dev_priv->dpll.lock);
}
+static void dg1_unmap_plls_to_ports(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
+
+ mutex_lock(&dev_priv->dpll.lock);
+
+ intel_de_rmw(dev_priv, DG1_DPCLKA_CFGCR0(phy), 0,
+ DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
+
+ mutex_unlock(&dev_priv->dpll.lock);
+}
+
static void icl_unmap_plls_to_ports(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
@@ -2900,6 +2945,40 @@ static void icl_unmap_plls_to_ports(struct intel_encoder *encoder)
mutex_unlock(&dev_priv->dpll.lock);
}
+static void dg1_sanitize_port_clk_off(struct drm_i915_private *dev_priv,
+ u32 port_mask, bool ddi_clk_needed)
+{
+ enum port port;
+ u32 val;
+
+ for_each_port_masked(port, port_mask) {
+ enum phy phy = intel_port_to_phy(dev_priv, port);
+ bool ddi_clk_off;
+
+ val = intel_de_read(dev_priv, DG1_DPCLKA_CFGCR0(phy));
+ ddi_clk_off = val & DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
+
+ if (ddi_clk_needed == !ddi_clk_off)
+ continue;
+
+ /*
+ * Punt on the case now where clock is gated, but it would
+ * be needed by the port. Something else is really broken then.
+ */
+ if (ddi_clk_needed) {
+ WARN(1, "ddi_clk_needed=%u ddi_clk_off=%u phy=%u\n",
+ ddi_clk_needed, ddi_clk_off, phy);
+ continue;
+ }
+
+ DRM_NOTE("PHY %c is disabled/in DSI mode with an ungated DDI clock, gate it\n",
+ phy_name(phy));
+
+ val |= DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
+ intel_de_write(dev_priv, DG1_DPCLKA_CFGCR0(phy), val);
+ }
+}
+
static void icl_sanitize_port_clk_off(struct drm_i915_private *dev_priv,
u32 port_mask, bool ddi_clk_needed)
{
@@ -2982,7 +3061,10 @@ void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder)
ddi_clk_needed = false;
}
- icl_sanitize_port_clk_off(dev_priv, port_mask, ddi_clk_needed);
+ if (IS_DG1(dev_priv))
+ dg1_sanitize_port_clk_off(dev_priv, port_mask, ddi_clk_needed);
+ else
+ icl_sanitize_port_clk_off(dev_priv, port_mask, ddi_clk_needed);
}
static void intel_ddi_clk_select(struct intel_encoder *encoder,
@@ -3507,7 +3589,9 @@ static void intel_ddi_pre_enable(struct intel_atomic_state *state,
drm_WARN_ON(&dev_priv->drm, crtc_state->has_pch_encoder);
- if (INTEL_GEN(dev_priv) >= 11)
+ if (IS_DG1(dev_priv))
+ dg1_map_plls_to_ports(encoder, crtc_state);
+ else if (INTEL_GEN(dev_priv) >= 11)
icl_map_plls_to_ports(encoder, crtc_state);
intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
@@ -3693,7 +3777,9 @@ static void intel_ddi_post_disable(struct intel_atomic_state *state,
intel_ddi_post_disable_dp(state, encoder, old_crtc_state,
old_conn_state);
- if (INTEL_GEN(dev_priv) >= 11)
+ if (IS_DG1(dev_priv))
+ dg1_unmap_plls_to_ports(encoder);
+ else if (INTEL_GEN(dev_priv) >= 11)
icl_unmap_plls_to_ports(encoder);
if (intel_crtc_has_dp_encoder(old_crtc_state) || is_tc_port)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 8b30daf7e304..8dc83b480466 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -10781,6 +10781,27 @@ static int hsw_crtc_compute_clock(struct intel_crtc *crtc,
return 0;
}
+static void dg1_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port,
+ struct intel_crtc_state *pipe_config)
+{
+ enum icl_port_dpll_id port_dpll_id = ICL_PORT_DPLL_DEFAULT;
+ enum phy phy = intel_port_to_phy(dev_priv, port);
+ enum intel_dpll_id id;
+ u32 val;
+
+ val = intel_de_read(dev_priv, DG1_DPCLKA_CFGCR0(phy))
+ & DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);
+ id = DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_VAL_TO_ID(val, phy);
+
+ if (WARN_ON(id > DPLL_ID_DG1_DPLL3))
+ return;
+
+ pipe_config->icl_port_dplls[port_dpll_id].pll =
+ intel_get_shared_dpll_by_id(dev_priv, id);
+
+ icl_set_active_port_dpll(pipe_config, port_dpll_id);
+}
+
static void cnl_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port,
struct intel_crtc_state *pipe_config)
{
@@ -11080,7 +11101,9 @@ static void hsw_get_ddi_port_state(struct intel_crtc *crtc,
port = TRANS_DDI_FUNC_CTL_VAL_TO_PORT(tmp);
}
- if (INTEL_GEN(dev_priv) >= 11)
+ if (IS_DG1(dev_priv))
+ dg1_get_ddi_pll(dev_priv, port, pipe_config);
+ else if (INTEL_GEN(dev_priv) >= 11)
icl_get_ddi_pll(dev_priv, port, pipe_config);
else if (IS_CANNONLAKE(dev_priv))
cnl_get_ddi_pll(dev_priv, port, pipe_config);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 1ae8d8542b66..7b963f362190 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -230,12 +230,14 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
#define _TRANS(tran, a, b) _PICK_EVEN(tran, a, b)
#define _PORT(port, a, b) _PICK_EVEN(port, a, b)
#define _PLL(pll, a, b) _PICK_EVEN(pll, a, b)
+#define _PHY(phy, a, b) _PICK_EVEN(phy, a, b)
#define _MMIO_PIPE(pipe, a, b) _MMIO(_PIPE(pipe, a, b))
#define _MMIO_PLANE(plane, a, b) _MMIO(_PLANE(plane, a, b))
#define _MMIO_TRANS(tran, a, b) _MMIO(_TRANS(tran, a, b))
#define _MMIO_PORT(port, a, b) _MMIO(_PORT(port, a, b))
#define _MMIO_PLL(pll, a, b) _MMIO(_PLL(pll, a, b))
+#define _MMIO_PHY(phy, a, b) _MMIO(_PHY(phy, a, b))
#define _PHY3(phy, ...) _PICK(phy, __VA_ARGS__)
@@ -10291,6 +10293,7 @@ enum skl_power_gate {
#define DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port) (3 << DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port))
#define DPCLKA_CFGCR0_DDI_CLK_SEL(pll, port) ((pll) << DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port))
+/* ICL Clocks */
#define ICL_DPCLKA_CFGCR0 _MMIO(0x164280)
#define ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy) (1 << _PICK(phy, 10, 11, 24))
#define ICL_DPCLKA_CFGCR0_TC_CLK_OFF(tc_port) (1 << ((tc_port) < PORT_TC4 ? \
@@ -10300,6 +10303,18 @@ enum skl_power_gate {
#define ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy) (3 << ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy))
#define ICL_DPCLKA_CFGCR0_DDI_CLK_SEL(pll, phy) ((pll) << ICL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy))
+/* DG1 Clocks */
+#define _DG1_DPCLKA_CFGCR0 0x164280
+#define _DG1_DPCLKA1_CFGCR0 0x16C280
+#define DG1_DPCLKA_CFGCR0(phy) _MMIO_PHY((phy) / 2, \
+ _DG1_DPCLKA_CFGCR0, \
+ _DG1_DPCLKA1_CFGCR0)
+#define DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy) (1 << (10 + ((phy) % 2)))
+#define DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy) (0x3 << (((phy) % 2) * 2))
+#define DG1_DPCLKA_CFGCR0_DDI_CLK_SEL(pll, phy) (((pll) % 2) << (((phy) % 2)) * 2)
+#define DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_VAL_TO_ID(val, phy) \
+ ((((val) & DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy)) >> ((phy % 2) * 2)) + (2 * (phy / 2)))
+
/* CNL PLL */
#define DPLL0_ENABLE 0x46010
#define DPLL1_ENABLE 0x46014
--
2.26.2
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